package c.y.c.thread;

import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;

public class ContainerNotSafeDemo {

    public static void main(String[] args) {

        //List<String> list = new ArrayList<>();
        //List<String> list = new Vector<>();
        //List<String> list = Collections.synchronizedList(new ArrayList<>());
        List<String> list = new CopyOnWriteArrayList<>();

        for (int i = 0; i < 30; i++) {

            new Thread(() -> {

                list.add(UUID.randomUUID().toString().substring(0, 8));
                System.out.println(list);
            }, String.valueOf(i)).start();

        }


    }

}
